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A052408 as a simple table

na(n)
10
20
30
41
51
63
76
820
948
10164
11551
122176
139985
1446969
15253285
161388694
178053363
1848266380
19294130212

[0,0,0,1,1,3,6,20,48,164,551,2176,9985,46969,
 253285,1388694,8053363,48266380,294130212]